Rare blue diamond ring to be auctioned in Switzerland

A fancy deep blue rectangular-cut diamond weighing 7.03 carats mounted by jeweler Moussaieff was presented by a model during a Christie's auction house preview in Geneva, Switzerland on Thursday. /VCG Photo

The rare blue diamond ring is expected to be auctioned at a price between 10 to 14 million U.S. dollars. /VCG Photo